139145 has 8 divisors (see below), whose sum is σ = 176904. Its totient is φ = 104704.

The previous prime is 139133. The next prime is 139169. The reversal of 139145 is 541931.

It is a happy number.

139145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3721 + 135424 = 61^2 + 368^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139145 - 2⁸ = 138889 is a prime.

It is a super-2 number, since 2×139145² = 38722662050, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 139145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734 + ... + 903.

It is an arithmetic number, because the mean of its divisors is an integer number (22113).

2¹³⁹¹⁴⁵ is an apocalyptic number.

It is an amenable number.

139145 is a deficient number, since it is larger than the sum of its proper divisors (37759).

139145 is a wasteful number, since it uses less digits than its factorization.

139145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659.

The product of its digits is 540, while the sum is 23.

The square root of 139145 is about 373.0214471046. The cubic root of 139145 is about 51.8190207574.

The spelling of 139145 in words is "one hundred thirty-nine thousand, one hundred forty-five".